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(Non-ridad.)

L. P. LAWRENCE.

VALVE FOR AIR 0R STEAM PIPBS.

No. 392,818. `Panented Nov. 13, 1888..

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STATES "artnr LOUIS P. LAVRENCE, OF PASSAO, NEV JERSEY, ASSIGNOR TO THELA`W- tENOE RAILVAY BRAKE COMPANY, OF NEV YORK.

VALVE FOR AIR OR STEAM PEPES.

SPECIFICATION forming part of Letters Patent No. 392,813, dated November13, 1883.

Application filed December 16, 18B?. Serial No. 258.085. (No modeL) Toall whom 15 may camera.-

Beit known that I, LOUIS l?. LAWRENCE, of Passaic, in the county ofPassaic, State of New Jersey, have invented certain new and usefulImprovements in Valves For Air or Steam Pipes, of which the following isaspecifcation.

The object of my invention is to provide a new and improved valve forair or steamv [o pipes of such construction that the water aecumulatingin the lower parts of the pipes or valve can easily be drawn off throughsaid valve.

The invention consists of a casing and a i5 slotted plug in the same,said casing being also provided with a lateral aperture, which can bebrought in communication with the slot of the plug at the same time thatthe ends of the slot are in communication with the 20 ends of theeasing, so as to permit the water that has accumulated in the pipes toblow off through the slot in the plug and through the aperture.

The invention also consists in the combination and construction of partsand details, as

will be fully described and set forth hereinafter, and finally pointedout in the claim.

In the accompanying drawings, Figure l is a side elevation of myimproved valve for steam or air pipes. Fig. 2 is a horizontal sectionalview of the same on the line a; x, Fig. 1. Fig. 3 is a cross-sectionalview of the easing, parts being in section and the plug being inelevation.

Similar letters of reference indicate corresponding parts.

The valveeasing A is provided with the tapering cylindrical bore B, forreceiving the correspondiugly-shaped plug C, having a vertical slot, D.The casing A is provided at each end with an internally screw-threadedneck, E, for att-aching pipes, said necks being in communication withthe bore B by the slots F. On a level with the bottom of the slot D inthe plug C the casing A is provided with a lateral aperture, G,establishing communication between the outer air and the bore. Thecasing is also provided with an preventing any escape of steam or air.

upwardly-projecting neck, H, having a quadrant-slot, I, in which a pin,J, turns, which 5o is passed through the slot and driven or screwed intoan aperture in the plug., A mark, K, is provided in the side of theeasing at the top edge. The pin J prevents rotating the plug more than aquarter-turn, and also prevents removing the plug from the casing. Incase the plug is to be removed for the purpose of repair or trimming,the pin J must be withdrawn.

As shown in Fig. 3, the plug completely fills the bore, in which it fitsvery snugly, thus forming an absolutely tight joint, and Vheu the valveis open, the slot D of the plug C is in line with the axis of the necksE, and when the valve is closed said slot is at right angles to thenecks. When it is desired to blow off any water that may haveaccumulated in the pipes, the plug is turned until the pin J is directlyabove the mark E in the side of 7o the casing. The plug() is then insuch a position that one end of its slot Dis in communication with thelateral aperture G, and one of the slots E establishes communicationbetween the neck and the bore, and the 0pposite end of the slot D is incommunication with the opposite slot F, establishing communicationbetween the bore and the'other neck of the casing. Any wateraccumulating in the valve or casing will now be forced by steam or airpressure through the slots F into the slot D, and from the same outthrough the aperture G.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The combination of a casing having a cylindrical borefor receiving a plug, slots at diametricallyppposite points of said boreand establishing communication between the ends of the casing and thebore, said casing being also provided with an aperture in its side forestablishing communication between the bore and the outer air, a plugmounted to turn in said bore and provided with a transverse slot, thewidth of which is greater than the distance from the side opening in thecasing to the nearest edge ef the adjacent slot, that es- Intestimenythat I claim the fore'geing as my tublishesv communicationbetween the bore and invention I have signed my name in presence the endof the easing, whereby the plug een of two subscribing witnesses. be soadjusted that its slet is in eonlmunieu- LOUIS I?. LAVRENCE.

5 tion with the two dinmetrieuily-epposite slots \Vitnesses:

of the easing and the side aperture ofthe ens- OSCAR F. GUNZ, ing at thesame time,substantia1ly as set forth'. JOI-IN A. STRALEY.

